Cook and peel the potatoes.

Mash the potatoes with salt, milk, onion salt, and 1/4 cup melted butter.

Chill the mashed potato mixture until firm (about 30 minutes).

Cut the cheese into 1-inch cubes.

Shape the mashed potatoes around the cheese cubes, forming 2 1/2-inch balls.

Crush the corn flakes into crumbs.

Roll the potato cheese balls in the crushed corn flake crumbs.

Brush the coated balls with the remaining 1/4 cup melted butter.

Place the buttered balls on a lightly greased cookie sheet.

Bake in a preheated oven at 350°F (175°C) for 20 minutes, or until heated through.